HLSL source did not yet compile as C#. Operator chose A throughout: generate the
full swizzle set and mixed constructors with a test over CultMath's own shader
bodies, fix cheap intrinsic semantics now and defer larger matrix features, add
Studio drawers for the new types after merge, and compile-check the shader
mirror with dxc.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
c8771eba45